Question

the length of rectangle is 40 and the perimeter of the rectangle is 100 then what is breath ​

Answer 1

perimeter of rectangle = 100

2(l+b) = 100

2( 40+b) = 100

80 +2b = 100

2b = 100- 80

2b = 20

b = 10

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Answer 2

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Given :

• Perimeter = 100 cm
• Length = 40 cm
• Breadth = ?

Now :

$</strong><strong>P</strong><strong> = 2(l + b) \\ = > 100 = 2(40 + b) \\ = > \frac{100}{2} = 40 + b \\ = > 50 = 40 + b \\ = > 50 - 40 = b \\ = > b = 10 \: cm$

Hence,

Breadth = 10 cm